• INSTRUCTIONS

MULTI-CO����S AUXILIARY

TYPE HFA53

GEI-68719E

. and Control GE Protect�� ley Parkway 205 Great 'A

a 19355-1337 Malvern, P

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GEI-68719

Figure 1 (8025536) HFA53 Back-Connected Relay in a Standard Case (Front View). Plunger on Hand-reset Relays Only

Figure 2 (8025537) HFA53 Back­Connected Relay with Flange for Semi-flush Mounting (Front View)

2

Figure 3 (8025264) HFA53 Front­Connected Relay in Standard Case (Front View)

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INTRODUCTION

GEI-68719

MULTI-CONTACT AUXILIARY RELAYS TYPE HFA53

DESCRIPTION

The Type HFA relays are instantaneous, hinged-armature, multi-contact, auxiliary relays. They have six (6) electrically separate contact circuits adaptable for either circuit-opening or circuit-closing application. This arrangement permits a number of operations to be performed simultaneously.

The HFA53 relays are available for front or back connection. The front-connected relays are suitable for surface mounting only.

The back-connected relays are suitable for either surface mounting or semi-flush mounting; a steel flange is necessary for the latter.

CHARACTERISTICS

Some of the contacts are built with a special offset so that when a circuit-opening contact and circuit-closing contact are used as a pair, a make-before-break circuit results. The use of these contacts requires an additional strong contact spring to prevent contact bounce and ensure contact overlap. These contacts are designated as long-wipe contacts.

The HFA53L relay is hand reset by means of a plunger assembly installed through the transparent cover. All other HFA53 relays covered by these instructions are self reset and have an instantaneous dropout.

The HFA53K, HFA53M, HFA53N, HFA53R, and HFA53T relays are designed to be connected with an external resistor to obtain a pickup time of 1 /2 cycle (60 cycle basis).

The contact code niust be specified by the arrangements listed in Table Ill. Only those contact arrangements listed are available.

RATINGS

The Type HFA relays are available with coil ratings for standard voltages up to 575 volts at 25, 50, or 60 cycles and up to 250 volts DC.

The current-closing rating of each contact is 30 amperes. The current-carrying rating is 1 2 amperes continuous or 30 amperes for one (1 ) minute. Table I lists the non-inductive interrupting capacity of each contact.

These instructions do not purport to cover all details or variations in equipment nor provide for every possible contingency to be met in connection with installation, operation or maintenance. Should further information be desired or should particular problems arise which are not covered sufficiently for the purchaser's purposes, the matter should be refered to the General Electric Company.

To the extent required the products described herein meet applicable ANSI, IEEE and NEMA standards; but no such assurance is given with respect to local codes and ordinances because they vary greatly.

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VOLTS

1 2 24 32 48

1 25 250

DC

AMPERES

30 1 5 1 0

8 3 1

GEI-68719

TABLE I

VOLTS

1 1 5 230 460 575

AC

AMPERES

30 20 1 5 1 0

The one second rating of the contact s circuit is 1 25 amps.

BURDENS

The burdens are measured with the relay in the picked-up position and at rated voltage.

TABLE II

DC COILS AC COILS

WATTS FREQ. VOLT-COLD HOT CYCLES AMPERES WATTS

25 1 0 4 7.8 6.0 50 23 9

60 32 1 2

INSTALLATION

MOUNTING AND CONNECTIONS

The Type HFA relays should be mounted on a vertical surface. The outline and panel­drilling diagrams are shown in Figures 6 through 9. Surface mounting on steel panels requires an insulating bushing for each terminal.

ADJUSTMENTS

The relays are shipped from the factory with all necessary adjustments made. If the relays should need adjustments, refer to the MAINTENANCE section of this book.

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GEI-68719

MAINTENANCE

ADJUSTMENTS

Contacts

HFA53 contact circuits can be changed from circuit-opening to circuit-closing, or vice versa, by removing the fixed contact, turning it over and replacing it.

If for any reason it becomes necessary to readjust the contacts, for instance, if a contact is changed from circuit opening to circuit closing, the following checks and adjustments should be made:

1 . Make sure that all contact and coil studs are tight.

2. Make sure that the armature is free of binding when operated by hand. The braided "pigtail" lead on all contacts must be adjusted to exert minimum force on the contacts.

3. Make mechanical contact adjustments as follows:

contacts shall be

A. The moving contact arms shall be adjusted so that the normally-open contacts make approximately simultaneously (_±_.008) when the relay is operated by hand. All normally-open contacts shall have a wipe of 3/64 to 3/32 inches. The contact gap shall be approximately 7/32 inch. This can be adjusted as follows:

a) Insert a 0.058 gage between the armature and pole face and close the armature.

b) Bend the left-hand moving contact to just light the continuity lamp.

c) Remove the 0.058 gage and where necessary bend the remaining moving contacts so that all moving contacts make at approximately the same time.

d) To check performance, turn the stop screw in until one contact continuity lamp is lit. Turn stop screw in an additional 1 /2 turn and all continuity lamps should be lit. Back off the stop screw to obtain at least 1 /4 inch contact gap.

e) Insert a 7/32 inch gage between any of the normally-open moving and stationary contacts and turn the stop screw clockwise until the continuity lamp lights. Lock the stop screw in this position with the locking nut.

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GEI-68719

Normally-Closed Contact Gap and Wipe

A. The moving contact arms shall be adjusted so that the normally-closed contacts make approximately simultaneously (_±_.008) when the relay is operated by hand. The wipe and gap are automatically set by the formation of the stationary contacts and the strength of the control spring. Adjustments can be made as follows:

a) Turn the stop screw clockwise until the first normally-closed contact opens.

b) Turn the stop screw an additional 1 /2 turn clockwise. All normally­closed contacts should be open.

c) Turn the stop screw Clockwise until there is an approximately 1 /8" gap between the stop screw and armature. Lock the stop screw in this position.

4. Recheck pickup after the above changes or adjustments have been made.

It is essential that AC relays be quiet when the voltage is above pickup.

Pickup

The relays are adjusted at the factory to pick up at 80% of the rating for AC coils and 60% of rating for DC coils. Normally these adjustments should not change; if it is necessary to readjust the relay, the adjusting nut should be lifted 1 /1 6 inch, turned clockwise to raise pickup or counterclockwise to lower pickup, and then reseated in the hexagonal groove in the armature tailpiece.

After the relay has been mounted, it should be operated a few times to be certain that the mechanism operates freely, and that the contact surfaces align properly and open quickly when the coil is deenergized on the self-reset models.

Pick-Up Time

The HFA53K, HFA53M, HFA53N, and HFA53T relays should pick up in eight milliseconds {8 ms) or less when rated voltage is applied across the resistor and relay coil combination. This time may be altered by adjustment of the armature stop screw.

CONTACT CLEANING

In cleaning fine silver contacts a flexible burnishing tool should be used. This consists of a flexible strip of metal with an etched roughened surface, resembling in effect, a superfine file. The polishing action is so delicate that no scratches are left, yet corroded materials will be removed rapidly and thoroughly.

Fine silver contacts should not be cleaned with knives, files or abrasive paper or cloth.

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GEI-68719

RENEWAL PARTS

When ordering renewal parts, address the nearest Sales Office of the General Electric Company, specify quantity required, name of part wanted, and give complete nameplate data. Refer to publication GEF-2757.

RELAY

HFA53B

HFA53D

HFA53E

HFA53F

HFA53H

HFA53J

TABLE Ill

CONTACT ARRANGEMENT c 0 POSITION D --

E 1 2 3

1 a1 b1 a1 2 a1 a1 b1

1 a b1 a1 2 b b1 a1 3 a b1 a1 4 b b1 a1

1 a a1 b1 2 b a1 b1 3 b a1 b1

1 a a b1 2 b a b1 3 b b b1 4 b b b1 5 a a b1 6 b a b1 7 b a b1 8 b b b1

1 a a a1 2 a b a1 3 a b a1 4 b b a1 5 b b a1

1 a a b1 2 a a b1 3 b a b1 4 b a b1 5 b b b1 6 b b b1

a = Normally-open contact a1 = Normally-open contact, long wipe b = Normally-closed contact b1 = Normally-closed contact, long wipe

7

4

b1 b1

b1 b1 a1 a1

a1 a1 a1

a1 a1 a1 a1 a1 a1 a1 a1

b1 b1 b1 b1 b1

a a a a a b

5 6

a1 b1 b1 a1

a1 b1 a1 b1 a1 b1 a1 b1

b1 a b1 a b1 b

b1 a b1 a b1 a b1 b a1 a a1 a a1 b a1 b

a a a a a b a b b b

a a b a b a b b b b b b

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RELAY

HFA53K

HFA53L

HFA53M

HFA53N

HFA53R

HFA53T

GEI-68719

TABLE Ill

CONTACT ARRANGEMENT c 0 POSITION D E

1 2 3

1 a a b1 2 a a b1 3 a a b1 5 a b b1

1 a a 61 2 b a b1 3 a a b1

1 a a b1

1 a a 61 2 a a b1 3 a a b1

1 a a1 61 2 a a1 b1 3 b a1 b1

1 a a 61 2 a a b1 3 a a b1

a = Normally-open contact a1 = Normally-open contact, long wipe b = Normally-closed contact b 1 = Normally-closed contact, long wipe

8

4

a a b b

a a a

b1

a a b

a1 a1 a1

a a b

5 6

a a b a b a b a

a a b a b a

a a

a a b a b a

b1 a b1 b b1 a

a a b a b a

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1

0---t

161 POS. POS.

6 5

2

GEI-68719

9

I POS.

'I POS.TPQS.

3 2 POS.

1

10

8

11

OPER. COIL

12

Figure 4 (6375767-3) Internal Connections for HFA53B, HFA53D, HFA53E, HFA53F, HFA53H, HFA53J and HFA53L Relays (Back View)

1 5

POS. PUS. POS 6 5 4

4 2 6

3

I NTERN AL CONNS. (BACK VIEW)

Figure 5 (459A231 Sh 1 [9]) Internal Connections for HFA53K, HFA53M, HFA53N, HFA53R, HFA53T Relays (Back View)

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OUTLINE

GEI-68719

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"A" DIA.HOLESl14 HOLES)

___ ___L!�� OF �AY I 64 -+--t--ti)--t--

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- DIA. �,.. Jj�¥1 l2 HOLES) �-_.._� 21

32 PANEL DRILL I NG l FRC*T VIEW)

lYPE OF PANEL "A" B INSULATING 7/16 .3-1116

STEEL 9/16 1-9/lE

Figure 6 (459A231 Sh.l [9]) Outline and Panel-Drilling Dimensions for HFA53 Surface-Mounted Relays (Typical Model Number is HFA53B(-)

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=, 7 0 ,•

1 6-'-

J

;;2

' ;;-..,-----� � �--t 17 9 f

532----1 ---s.!..-- 1

2 , Ts

GEI-68719

�,��j s 16 6---

16 15 f----7 32

OUTLINE PANEL DRI LLIIC6

Figure 7 {41 8A799 Sh.1 [8]) Outline and Panel-Drilling Dimensions for HFA53 Relays for Semi-flush Mounting (Typical Model Number is HFA53K(-)F)

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GEI-68719

Figure 8 (104A8527-5) Outline and Panel-Drilling Dimensions for HFA53 Front-Connected Relays, (Typical Model Number is HFA53B(-)H)

10-:,2. Tt-+D. (T'(PICAL)

9 )2 HOLE

I . �- 1�-

* Figure 9 (389A 752 [2]) Outline of External Resistor Used with HFA53K, HFA53M, HFA53N, HFA53R and HFA53T Relays

* Indicates revision

ST-10/93 (1000) GENERAL ELECTRIC PROTECTION AND CONTROL BUSINESS DEPT., MALVERN, PA 19355

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